JPS6012035Y2 - de-cylinder - Google Patents

Description

[Detailed description of the invention] This invention relates to a decoupling cylinder used for a waterproof layer on the roof of a building, etc.

Conventionally, as this type of decylinder, the one shown in FIG. 1 and the one described in Japanese Utility Model Publication No. 54-31321 are known.

In the former case, since the inner tube 1 and the outer tube 2 are fixed completely separately, the outer tube 2 is prone to fall down due to wind shock, etc., and the outer tube 2 is made of integrally molded plastic. Therefore, there was a drawback that the molding cost was relatively high.

Furthermore, in the latter case, the inner cylinder and the outer cylinder are fixed with a bold nut, but this has the drawbacks of being troublesome to work on site and being relatively expensive.

This invention was created to solve the above-mentioned difficulties, and embodiments thereof will be described in detail below with reference to the accompanying drawings.

Figures 2 to 4 show an embodiment of this invention, in which Figure 2 is a sectional view, Figure 3 is a sectional view taken along the line ■-m in Figure 2,
FIG. 4 is a perspective view of the inner cylinder, and FIG. 5 is a perspective view of the lower member of the outer cylinder.

In the drawing, the inner cylinder 1 is placed on the upper surface of the slab concrete A or in the waterproof layer B of the laminated structure, and as shown in Fig. A striped protrusion 1a is formed in the vertical direction on the outer surface from the cylindrical part to the hem and on the lower surface of the hem.

Due to the presence of the protrusion 1a, an air passage is formed between the cylindrical part and the outer cylinder as described later, and at the hem part, for example, a waterproof sheet as a waterproof layer is applied to the inner cylinder 1.
This prevents the air flow path from being blocked due to close contact with the air flow path.

When the waterproofing around the inner cylinder 1 is completed, the outer cylinder 2 is attached to the upper part of the inner cylinder 1, and the area around it is further waterproofed.

As shown in FIGS. 2 and 3, the outer cylinder 2 is composed of a lower member 2a, an upper member 2b, and a cap member 2c.

As shown in FIG. 5, the lower member 2a has a cylindrical portion that engages with the upper portion of the inner cylinder 1 described above, in the center of a flat or inclined bottom plate.

Butyl rubber or the like is arranged in a ring shape on the upper surface of the bottom plate.

The lower end of the cylindrical part of the lower member 2a of the outer cylinder 2 is fixed to the upper part of the cylindrical part of the inner cylinder 1 as shown in FIG. An air passage is formed without the two being in close contact with each other.

A cap 2c is attached to the upper end of the outer cylinder upper member 2b with a pleated protrusion structure while leaving an air flow path to prevent rainwater from entering.

Note that the reason why the outer cylinder 2 is divided into the upper member 2b and the lower member 2c is to reduce the molding cost.
Since the lower member 2a is molded from plastic and the lower member 2a is molded by pressing a metal plate, both may be integrally molded from plastic.

Since the decoupling cylinder of this invention is constructed as described above, the inner cylinder and the outer cylinder can be firmly fixed simply by engaging them, so the work efficiency is high, and the outer cylinder does not fall off from the waterproof layer. There is little risk of this, and furthermore, air passages are formed on both the inner and outer surfaces of the inner cylinder due to the presence of the fold-like protrusions on the inner cylinder, making it possible to efficiently eliminate water vapor in the waterproof layer of the laminated structure.

Furthermore, with adhesive such as butyl rubber provided on the outer cylinder,
Intrusion of rainwater etc. from the de-cylinder arrangement area is effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional decoupling cylinder, Fig. 2 is a sectional view of the decoupling cylinder of this invention, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4
The figure is a perspective view of the inner cylinder, and FIG. 5 is a perspective view of the lower member of the outer cylinder. In the figure, 1 is an inner cylinder, 1a is a pleated projection, 2 is an outer cylinder,
2a indicates the outer cylinder lower member, 2b indicates the outer cylinder upper member, 2c indicates the cap member, A indicates the slab concrete, and B indicates the waterproof layer.

Claims (1)

[Scope of utility model registration request] An inner cylinder consisting of a cylindrical part with longitudinally protruding protrusions on at least its outer surface and a hem part extending at its lower end, and a cylinder covered with a cap in which an air flow path is formed. The inner cylinder is embedded in the waterproof layer, and the outer cylinder is covered with the upper part of the outer cylinder, and at least the lower quarter of the outer cylinder is When the upper surface is covered with waterproof coating, steam generated in the waterproof layer on the lower surface of the inner cylinder passes through the lower surface of the hem, the inside of the inner cylinder, the inside of the outer cylinder, and the air flow path of the cap, and the upper surface of the inner cylinder and the lower part of the outer cylinder. 4
The steam generated in the waterproof layer on the lower side of the tube is discharged to the outside through the air flow path formed at the joint between the inner cylinder and the outer cylinder, the inside of the outer cylinder, and the air flow path in the cap. Features a de-cylinder.